參數(shù)資料
型號: MB90587PF
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: Quadruple 2-Input Positive-OR Gate 20-LCCC -55 to 125
中文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封裝: PLASTIC, QFP-100
文件頁數(shù): 43/124頁
文件大?。?/td> 2638K
代理商: MB90587PF
MB90580B Series
43
5. External Memory Access (External Bus Pin Control Circuit)
The external bus pin control circuit controls external bus pins used to expand the address/data buses of the
CPU outside.
(1) Register configuration
(
2
)
Block Diagram
Automatic ready function selection register
bit
Address
: 0000A5
H
Access
Initial value
External address output control register
bit
Address
: 0000A6
H
Access
Initial value
Bus control signal selection register
bit
Address
: 0000A7
H
Access
Initial value
ARSR
IOR1 IOR0 HMR1 HMR0
()
()
()
()
LMR1 LMR0
15
14
13
12
11
10
9
8
(W)
(0)
(W)
(0)
(W)
(1)
(W)
(1)
(W)
(0)
(W)
(0)
HACR
E23
E22
E21
E20
E19
E18
E17
E16
7
6
5
4
3
2
1
0
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
ECSR
CKE
RYE
HDE IOBS HMBS WRE LMBS
()
()
15
14
13
12
11
10
9
8
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
(W)
(0)
P0
RB
P0
P1
P2
P3
P3
P0 data
Access control
P0 direction
Data control
Address control
Access control
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